What is heat? -Heat is energy that flows from an object with a higher temperature to an object with a lower temperature. High Temperature Low Temperature What is the source of Earth’s energy? The Sun

The Sun is important because it: Provides heat and light Creates the wind Creates ocean currents Provides energy to plants

6% reflected by the atmosphere 25 % reflected from clouds 15% absorbed by the atmosphere 4% reflected from Earth’s surface 50 % directly or indirectly absorbed by Earth’s surface

Heat is transferred through the atmosphere through: Radiation Conduction Convection

Radiation -Radiation is heat that is transferred in the form of rays or waves Example: Microwaves, Sun rays

Conduction -Conduction is the transfer of heat that occurs when molecules bump into one another -Heat travels through direct contact -Example: your feet get hot on the beach while walking on the sand

Conduction

Convection -Convection is the transfer of heat by the flow of a gas or liquid. - Circulates heat through convection currents

What do you think will happen when I hold this spiral over the candle? Write it down!

Atmospheric Pressure and Altitude Less air pressure More air pressure

Convection -When air is warmed, molecules in the air start to move apart -Air pressure decreases because fewer molecules are in the same place

Convection -Warm air rises because there is less air pressure. - Cold air sinks because there is more air pressure

Convection

Which heat transfers do you predict are involved in a lava lamp? Explain!